O66 - Other obstructed labor
O66.0 - Obstructed labor due to shoulder dystocia
O66.1 - Obstructed labor due to locked twins
O66.2 - Obstructed labor due to unusually large fetus
O66.3 - Obstructed labor due to other abnormalities of fetus
O66.4 - Failed trial of labor
O66.40 - Failed trial of labor, unspecified
O66.41 - Failed attempted vaginal birth after previous cesarean delivery
O66.5 - Attempted application of vacuum extractor and forceps
O66.6 - Obstructed labor due to other multiple fetuses
O66.8 - Other specified obstructed labor
O66.9 - Obstructed labor, unspecified